How can I enable WebGL in Qt 5.9 under Windows? - qt

Question

I want to use WebGL in QtWebEngineWidgets.QWebEngineView under Windows with my Qt 5.9.2.
But when I try to load webglreport.com, in QWebEngineView it tells me, that "This browser supports WebGL 2, but it is disabled or unavailable."
How can I fix it?
Here's my code:
PyQt:
import os, sys
from PyQt5 import QtCore, QtGui, QtWidgets, QtWebEngineWidgets
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
# app.setAttribute(QtCore.Qt.AA_UseOpenGLES) # nothing happens, you can comment it out
view = QtWebEngineWidgets.QWebEngineView()
# view.settings().setAttribute(QtWebEngineWidgets.QWebEngineSettings.WebGLEnabled, True) # does not help too = (((
view.load(QtCore.QUrl("http://webglreport.com/?v=2"))
view.show()
sys.exit(app.exec_())
# And here WebGL Report will tell me: "This browser supports WebGL 2, but it is disabled or unavailable."
# How can I cope with it???
C++ Qt:
#include <QApplication>
#include <QtWebEngineWidgets/QWebEngineView>
#include <QUrl>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWebEngineView view;
view.load(QUrl("http://webglreport.com/"));
view.show();
return a.exec();
}

Answer 1

Binary Packages
Wheels are provided for Python v3.5 and later for 64-bit Linux, macOS and 32-bit and 64-bit Windows. These include copies of the corresponding Qt libraries.
Note that the minimum version of macOS supported is determined by the version of Qt included in the wheel.
Note that for v5.11 and later the 32-bit Windows wheels do not contain the WebEngine modules.
pyqt download